3.5 - 127
3.5
Isolated Hermetic Surface Mount Package
1.0 Amp, Positive Adjustable Voltage
Regulator
4 11 R1
Supersedes 1 05 R0
SURFACE MOUNT POSITIVE ADJUSTABLE
1.0 AMP VOLTAGE REGULATOR
FEATURES
Hermetic Isolated Surface Mount Package
Adjustable Output Voltage
Eliminates Stocking Fixed Voltages
Built-In Thermal Overload Protection
Short Circuit Current Limiting
Product Is Available Hi-Rel Screened
Electrically Similar To Industry Standard P/N LM117
DESCRIPTION
This three terminal positive regulator is supplied in a hermetically sealed metal
surface mount package. All protective features are designed into the circuit, including
thermal shutdown, current limiting and safe-area control. With heat sinking, they can
deliver over 1.0 amp of output current. This unit features output voltages that can be
trimmed using external resistors, from 1.2 volts to 37 volts.
ABSOLUTE MAXIMUM RATINGS
Input to Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405 V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C
Typical Power/Thermal Characteristics:
Rated Power @ 25C
T
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5W
T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W
Thermal Resistance:
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5C/W
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W
Lead Temperature at Case (5 sec)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225C
OM7635SM
OM7635SM
3.5
ELECTRICAL CHARACTERISTICS
-55C T
A
125C, I
L
= 8mA (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min.
Max.
Unit
Reference Voltage
V
REF
V
DIFF
= 3.0V, T
A
= 25C
1.20
1.30
V
DIFF
= 3.3V
1.20
1.30
V
V
DIFF
= 40V
1.20
1.30
Line Regulation
R
LINE
3.0V V
DIFF
40V, V
out
= V
ref
, T
A
= 25C
-9
9
mV
(Note 1)
3.3V V
DIFF
40V, V
out
= V
ref
-23
23
Load Regulation
R
LOAD
V
DIFF
= 3.0V, 10mA I
L
1.5A, T
A
= 25C
-15
15
(Note 1)
V
DIFF
= 3.3V, 10mA I
L
1.5A
-15
15
mV
V
DIFF
= 40V, 10mA I
L
300mA, T
A
= 25C
-15
15
V
DIFF
= 40V, 10mA I
L
195mA
-15
15
Thermal Regulation
V
RTH
V
in
= 14.6V, I
L
= 1.5A
-16
16
mV
P
d
= 20 Watts, t = 20 ms, T
A
=25C
Ripple Rejection
R
N
f = 120 Hz, V
out
= V
ref
66
dB
(Note 2)
C
Adj
= 10 F, I
out
= 100 mA
Adjustment Pin Current
I
Adj
V
DIFF
= 3.0V, T
A
= 25C
100
V
DIFF
= 3.3V
100
A
V
DIFF
= 40V
100
Adjustment Pin
I
Adj
V
DIFF
= 3.0V, 10mA I
L
1.5A, T
A
= 25C
-5
5
Current Change
V
DIFF
= 3.3V, 10mA I
L
1.5A
-5
5
V
DIFF
= 40V, 10mA I
L
300mA, T
A
= 25C
-5
5
V
DIFF
= 40V, 10mA I
L
195mA
-5
5
A
3.0V V
DIFF
40V, T
A
= 25C
-5
5
3.3V V
DIFF
40V
-5
5
Miminum Load Current
I
Lmin
V
DIFF
= 3.0V, V
OUT
= 1.4V (forced)
5.0
V
DIFF
= 3.3V, V
OUT
= 1.4V (forced)
5.0
mA
V
DIFF
= 40V, V
OUT
= 1.4V (forced)
5.0
Current Limit
I
CL
V
DIFF
= 15V
1.5
3.5
(Note 2)
V
DIFF
= 40V, T
A
= 25C
0.18
1.5
A
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. If not tested, shall be guaranteed to the specified limits.
3. The
denotes the specifications which apply over the full operating temperature range.
PIN CONNECTION
MECHANICAL OUTLINE
.425
.200
.100
.350 MIN.
.080
.160
.020
.020
.035 WIDE
FLAT 3 PLCS.
.115
.425
Pin 1: V
OUT
Pin 2: Adjust
Pin 3: V
IN
Case: Isolated
2
3
1
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